Before commencing her training at Mountview, Louisa appeared as a series regular in Love/Hate for RTÉ alongside Aidan Gillen and Robert Sheehan.

Further screen credits include Channel 5's The Deceived, Discovery's mini-series Harley and the Davidsons, Woody Harrelson's feature film Lost in London. In 2022, the third and final season of Derry Girls, aired to wide-spread critical acclaim. ‍

On stage Louisa starred in the one woman show Cotton Fingers with National Theatre Wales and performed in a sell-out run at the Royal Court of Glass. Kill. Bluebird. Imp; a collection of new plays by Caryl Churchill. Most recently she starred as Agnes in Dancing at Lughnasa at the National Theatre directed by Josie Rourke. ‍

Louisa played a leading role alongside Jack Rowan in the comedy/horror feature film Boys from County Hell, and she has recently wrapped Joy directed by Ben Taylor, where she features alongside Bill Nighy and James Norton. ‍

Louisa will be playing the title role in Sally Wainwright’s highly-anticipated new Disney+ series, The Ballad of Renegade Nell, and early next year she will join Brian Cox and Patricia Clarkson on stage in Long Day's Journey into Night directed by Jeremy Herrin.